The production of prompt photons has been studied in
the collisions of quasi-real photons at LEP. The OPAL
data taken at e+e- centre-of-mass energies between 183 and 209 GeV
have been used. The results are sensitive to the quark content
of the photon. They are compared to the leading order predictions
of PYTHIA.
Stefan Soldner-Rembold
2001-05-14